Lutron Electronics CT-2012 User manual

4-20 mA
Controller/Alarm
Indicator
Model : CT-2012
Your purchase of this 4 to 20 mA CONTROLLER marks a
step forward for you into the field of precision
measurement. Although this METER is a complex and
delicate instrument, its durable structure will allow many
years of use if proper operating techniques are
developed. Please read the following instructions
carefully and always keep this manual within easy reach.
OPERATION MANUAL

Caution Symbol
Caution :
* Risk of electric shock !
Caution :
* Do not use fingers or any tool
to touch the Wire Terminals.
* Do not apply the relay contact load
current > 0.5 Amp.
* The instrument contains no user
serviceable parts and should not
be opened by the user.
* Repair or after service should be
done by a qualified technician only.
* Power supply should apply the
correct ACV power voltage
* Cleaning - Only use the dry cloth to
clean the plastic case !
* Equipment protected throughout
by Double Insulation or Reinforced
Insulation.
Environmental Condition
* Comply with EN61010.
Transient over voltage at Mains Supply 2500V.
* Pollution Degree 2.
* Altitude up to 2000 meters.
* Indoor use.
* Relative humidity 80% max.

TABLE OF CONTENTS
1. FEATURES.........................................................................
1
2. SPECIFICATIONS..................................................................
2
3. FRONT PANEL DESCRIPTION............................................
5
3-1 Display....................................................................
5
3-2 PV ( process value ) indicator............................................
5
3-3 SV ( set value ) indicator............................................
5
3-4 Set Button..............................................................
5
3-5 Button..............................................................▼
5
3-6 Button.............................................................▲5
3-7 Control relay indicator........................................... 5
3-8 Alarm relay indicator............................................ 5
3-9 Wire terminals.................................................... 5
3-10 Case holder ....................................................... 5
3-11 RS232 terminal................................................... 5
4. MEASURING PROCEDURE .......................................... 6
4-1 Terminal connection.................................................
6
4-2 1st layer setting procedures......................................
7
a. Control Low limit value setting.............................. 7
b. Control High limit value setting............................ 7
c.
Alarm Low limit value setting...................................
8
d.
Alarm High limit value setting...................................
8
4-3 2nd layer setting procedures......................................
9
a.
Point position setting...............................................
9
b. 4 mA value setting............................................... 9
c.
20 mA value setting................................................
10
d.
Digital filter value setting..........................................
10
e.
Control hysteresis value setting...............................
11
f.
Alarm hysteresis value setting.................................
12
g.
Offset value adjustment...........................................
13
h.
Gain value setting...................................................
13
i.
RS232 output unit code setting..................................
14
5.. RS232 PC SERIAL INTERFACE.....................................................
14
6. SYSTEM RESET......................................................... 17
7. THE ADDRESS OF AFTER SERVICE CENTER......................
17

1. FEATURES
* Input : 4-20 mA DC, linear.
* User can default the desired display value between
-1999 to 9999 ( decimal point can be selected to DP1,
DP2, DP3 ) and all the preset data will be saved into
the memory circuit permanently.
* According the 4 to 20 mA input signal, user can preset
the desire display value between -1999 to 9999 ( decimal
point can select to DP1, DP2, DP3 ). Until set the display
value, all the data will save into the memory circuit
permanently
* When CT-2012 cooperate LUTRON's 4 to 20 mA
transmitters ( or any other transmitters if it build 4 to
20 mA output signal ), whole system will become the
high performance Controller/Alarm/Indicator for
following measuring functions : Humidity, Light, pH,
Dissolved Oxygen, Conductivity, Vibration, Pressure,
Sound, Temperature, RPM, Hz, Load cell ( Weight,
Force ), Potential ( Angle, Level ). ACV, ACA, DCV,
DCA, WATT....
* Easy to adjust the function factors by push button
on the front panel.
* Control output : 2 points ( COM, NO ).
* Alarm output : 2 points ( COM, NO ).
* Control Relay will make action when the reading value
reach to control value.
* Hysteresis value setting for control and alarm function.
* Large red LED display, high brightness and easy to read.
* Microprocessor circuit ensures high accuracy and
provides special functions and features.
* DC 12V power supply output.
* RS232/USB computer interface.
* Power : 90 ACV - 264 ACV, 50/60 Hz.
* Standard 96 X 48 mm DIN case.
* Optional data acquisition software.
1

2. SPECIFICATIONS
Display * 4 digits red LED,
14 mm ( 0.55 inch ) digit height
* 4 indicators :
PV ( process value ) indicator
SV ( set value ) indicator
Control out indicator
Alarm out indicator
* According the 4-20 mA input signal,
user can preset the desire display value
between -1999 to 9999 ( decimal point
can select to DP1, DP2, DP3 ). Until set
the display value, all the data will save
into the memory circuit permanently
Input Signal Linear, 4 to 20 mA
Circuit Custom chip of microprocessor LSI
circuit.
Sampling Time Approx. 1 second.
Relay Output Number 2 relays
Function Relay 1 :
High/Low control relay.
Relay 2 :
High/Low alarm relay.
Max load 0.5 ACA/250 ACV
0.5 DCA/24 DCV
*
Do not apply the relay
contact load current
> 0.5 A, other wise the
relay may be damaged
permanently without
warranty.
2

* Decimal point adjustment :
DP1, DP2, DP3
Main * Low limit of range adjustment
Internal 4 mA = X X X X, min. value is -1999
Function * High limit of range adjustment
Selection 20 mA = X X X X, max. value is 9999
* Alarm value adjustment :
High Alarm or Low alarm.
* Control value adjustment
High control or Low control.
* Control hysteresis value setting.
* Alarm hysteresis value setting.
* Filter value of display reading
* Offset adjustment.
* Gain adjustment.
* RS232 output unit code setting
Default of internal function :
Without advice previously, the function
of CT-2012 will preset :
* 4 mA = 0, 20 mA = 9999.
* High control mode.
* High alarm mode.
* RS232 output unit code = 0 ( no unit ).
Front Panel * Control set-point value adjustment.
Function * Measuring value ( Process value )
Selection offset. Use to offset the PV indication
from the actual PV.
* Alarm set-point value adjustment.
External DC 12 V, 50 mA max.
Power Supply
Data Output RS 232 PC serial interface.
Operating 0 to 50 .℃
Temperature
Operating Less than 80% R.H.
Humidity
3

Power Supply 90 to 260 ACV, 50/60 Hz.
Power Approx. 3.5 VA/AC 110V.
Consumption Approx. 4.9 VA/AC 220V.
Weight 384 g/ 0.84 LB.
Dimension DIN size : 96 x 48 mm.
Panel cut size : 92 mm x 46 mm.
Depth : 110 mm.
Accessories
Instruction manual..............................
1 PC
Included
Case holder with screw..............................
2 PCs
Optional * Data Acquisition software,
Accessories SW-U801-WIN.
* RS232 cable, UPCB-02.
* USB cable, USB-01.
4

3. FRONT PANEL DESCRIPTION
Fig. 1
3-1 Display
3-2 PV ( process value ) indicator
3-3 SV ( set value ) indicator
3-4 Set Button
3-5 Button▼
3-6 Button▲
3-7 Control relay indicator
3-8 Alarm relay indicator
3-9 Wire terminals
3-10 Case holder
3-11 RS232 terminal
5

4. MEASURING PROCEDURE
4-1 Terminal connection
1)Input the ACV power ( 90 to 260 ACV ) to T1, T2.
Do not input the
over voltage to the
AC input terminals.
2)Connect the " Control Relay " output from T3, T4.
Connect the " Alarm Relay " output from T5, T6.
3)Connect the input signal ( 4 to 20 mA DC ) to
to the input terminal T15 (+), T16 (-).
4)T7 (+), T8 ( - ) are DC 12 V power supply terminal.
If the measured installation ( transmitters ) need the
the external DC 12V power supply, can connect its
power supply from T7, T8.
6

4-2 1st layer setting procedures
CtLo Control Low limit value setting
CtHi Control High limit value setting
ALLo Alarm Low limit value setting
ALHi Alarm High limit value setting
a. Control Low limit value setting
1)Press the " Set Button " ( 3-4, Fig. 1 ) once, the
" Display " will show " CtLo ", now the meter is ready
for the " Control Low limit value " setting.
2)Use the " Button " ( 3-5, Fig. 1 ) and the " ▼ ▲
Button " ( 3-6, Fig. 1 ) to adjust the desiring " Control
Low limit value ", press the " Set Button " ( 3-4, Fig. 1 )
to save the setting value.
Remark :
*During adjust the value, the " SV indicator " ( 3-3, Fig. 1 )
will light.
*The function of " Control Low limit value " setting, refer to
page 11, Fig. 3.
b. Control High limit value setting
1)After finish above " Control Low limit value setting ",
press the " Set Button " ( 3-4, Fig. 1 ) once, the
" Display " will show " CtHi ", now the meter is ready
for the " Control High limit value " setting.
2)Use the " Button " ( 3-5, Fig. 1 ) and the " ▼ ▲
Button " ( 3-6, Fig. 1 ) to adjust the desiring " Control
High limit value ", press the " Set Button " ( 3-4, Fig. 1 )
to save the setting value.
7